Here's a breakdown:
* Mis-: A prefix meaning "wrong" or "badly."
* Pronounce: To say a word or words aloud.
So, mispronounce literally means to "pronounce wrongly."
Here are some examples:
* Mispronouncing "library" as "liberry."
* Mispronouncing "often" as "offen."
* Mispronouncing "February" as "Febuary."